OBJ2CR2 will give you something that will work, within Poser - it will be easier than using the setup room, and it will be many times easier than the manual method. Unless you've literally saved up your last pennies to buy it, I'd say go for it. Chances are, for a corset, you won't need to do anything else with its output. And if you do, Phil's after-sales service is second to none.